(CNN) - During the 2008 presidential campaign, then-Sen. Barack Obama repeatedly promised that if elected he would clean up the way Washington works and bar lobbyists from working in his administration.

"I have done more to take on lobbyists than any other candidate in this race - and I've won," Obama said during the primaries. "I don't take a dime of their money, and when I am president, they won't find a job in my White House."

But just weeks after Obama's inauguration, one found a job in the Pentagon.

William Lynn was confirmed as the No. 2 man in the Defense Department, a bit of a shock because he had spent much of the last decade as a lobbyist for Raytheon, the $25 billion a year defense contractor that makes the Army's Patriot missile system and the Navy's Tomahawk missile.